minor fixes to Eigen adapter

Former-commit-id: 9095bbc9d4

src/adapters/EigenAdapter.cpp

@@ -1 +1,25 @@
 #include "src/adapters/EigenAdapter.h"
+
+namespace storm {
+    namespace adapters {
+     
+        template<typename ValueType>
+        static std::unique_ptr<Eigen::SparseMatrix<ValueType>> toEigenSparseMatrix(storm::storage::SparseMatrix<ValueType> const& matrix) {
+            // Build a list of triplets and let Eigen care about the insertion.
+            std::vector<Eigen::Triplet<ValueType>> triplets;
+            triplets.reserve(matrix.getNonzeroEntryCount());
+            
+            for (uint64_t row = 0; row < matrix.getRowCount(); ++row) {
+                for (auto const& element : matrix.getRow(row)) {
+                    triplets.emplace_back(row, element.getColumn(), element.getValue());
+                }
+            }
+            
+            std::unique_ptr<Eigen::SparseMatrix<ValueType>> result = std::make_unique<Eigen::SparseMatrix<ValueType>>(matrix.getRowCount(), matrix.getColumnCount());
+            result->setFromTriplets(triplets.begin(), triplets.end());
+            return result;
+        }
+        
+        template std::unique_ptr<Eigen::SparseMatrix<double>> toEigenSparseMatrix(storm::storage::SparseMatrix<double> const& matrix);
+    }
+}

src/adapters/EigenAdapter.h

@@ -16,20 +16,7 @@ namespace storm {
              * @return A pointer to a row-major sparse matrix in gmm++ format.
              */
             template<class ValueType>
-            static std::unique_ptr<Eigen::SparseMatrix<ValueType>> toEigenSparseMatrix(storm::storage::SparseMatrix<ValueType> const& matrix) {
+            static std::unique_ptr<Eigen::SparseMatrix<ValueType>> toEigenSparseMatrix(storm::storage::SparseMatrix<ValueType> const& matrix);
-                std::vector<Eigen::Triplet<ValueType>> triplets;
-                triplets.reserve(matrix.getNonzeroEntryCount());
-                
-                for (uint64_t row = 0; row < matrix.getRowCount(); ++row) {
-                    for (auto const& element : matrix.getRow(row)) {
-                        triplets.emplace_back(row, element.getColumn(), element.getValue());
-                    }
-                }
-                
-                std::unique_ptr<Eigen::SparseMatrix<ValueType>> result = std::make_unique<Eigen::SparseMatrix<ValueType>>(matrix.getRowCount(), matrix.getColumnCount());
-                result->setFromTriplets(triplets.begin(), triplets.end());
-                return result;
-            }
         };
         
     }